To provide a tray free to be drawn out/in with a tray-attaching structure whereby a storage tray does not fall off even when small cosmetic articles, small toiletry articles, etc., are taken out.

In a tray free to be drawn out/in which is formed in the side, etc., of a storage cabinet or mirror cabinet, elastic hooking parts 1a are provided, and recesses 2b are formed in the grooves of a cabinet main body, thereby providing a mechanism in which when the tray is attached, the hooking parts 1a and recesses 2b engage and prevent it from falling off. Thus, the function of the structure whereby the tray does not fall off even if the tray is contacted when small cosmetic articles, small toiletry articles, etc., are taken out is achieved without additional parts but by only molding members.